DC-902200-1.9, Duracast 2200 Gallon Heavy Duty Vertical Tank | 902200 These Duracast vertical tanks provide heavy duty storage capabilities. The polyethylene resin is resilient to help keep the cylindrical shape of the tank. The resin is also UV stabilized, which slows down the overall wearing process caused from sunlight. These tanks are rotationally molded and turn out as a one-piece structure with no seams or joints. Because these tanks are both rust- and corrosion-resistant, they can handle a wide variety of contents without becoming damaged. Some of the more common contents people use these tanks to store include industrial and agricultural chemicals, vegetable oils, biodiesel, liquid fertilizer, liquid feed and certain acids like wine. This is a 1.9 specific gravity tank.